Well that looks like an include file ordering problem.
Check the manuals to see what order various allegro and GL header files should be in.
Well that looks like an include file ordering problem.
Check the manuals to see what order various allegro and GL header files should be in.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.